Genus Myzomyia. 31 
dicularly beneath the commencement of the third spot of the anterior 
margin; the fork-cell of the fourth vein-is farther away in an outward 
direction, so that there is a very considerable dilference in the length of 
the two superior forks, which is more remarkable than in A. punctulatus, 
leucopus, etc. ‘lhe auxiliary vein terminates a little in front of the fifth 
longitudinal vein. The two central spots of the anterior margin are of 
about even length, the first and fourth only about half the length of 
these. In the radical part on the costa there are two small dark spots, of 
which the second of the specimen being described has amalgamated with 
the first typical spot. This, however, does not always take place. The 
typical spots of the anterior margins are divided by short light incisions ; 
the last of these is only half the length of the other two. All four dark 
spots extend in equal length to the first vein with the exception of spot 
two, beneath the first half of which the first vein is not darkened. On 
the stem of the upper fork there is a dark spot immediately in front of 
the division, and there is a very small one at its commencement just 
under the centre of the second spot of the anterior margin. ‘The place of 
division and the centre of the upper branch are light. The lower branch 

Wing of Myzomyia aconita. (f. 
After Dénitz. 
_ in its centre is slightly lighter; in other specimens, however, a consider- 
able length is light. he third longitudinal vein only carries the marginal 
spot (the spots otherwise at their commencement before and behind the 
transverse veins are distinguished by isolated scales which are frequently 
hardly discernible through the microscope; this condition was more especially 
noted in specimens from Soekaboemi). ‘The first third of the stem of 
the lower fork is light, then dark to the division, with a short light inter- 
ruption at the transverse veins, which are arranged step-like: the spot of 
division itself is white; both branches dark, the lower one with a light 
centre. In other specimens the entire first half of the lower branch is 
light and the centre of the superior branch may become light. ‘The fifth 
vein has ouly a radical and marginal spot, its branch is dark over half its 
extent and only interrupted by the light surroundings of the inferior 
transverse vein. ‘The sixth longitudinal vein has a very long central spot 
and a very small radical spot which may become confluent with the 
central spot. ‘lhe marg nal poin's are mostly lengthened out to streaks. 
The light spots are light yellow ochre at the anterior margin, more 
erey on the area of the wings. 
